Loading coil container



Feb. 14, 1939. w COX 2,147,245

LOADING COIL CONTAINER- Filed March '7, 1936 2 Sheets-Sheet 1 FIG I INVENTOR IRVIN W. COX

ATTORNEY.

Feb. 14, 1939. L o 2,141,245

LOADING COIL CONTAINER Filed March 7, 1936 2 Sheets-Sheet 2 I Z I (D E I l l 1-- q i m N FIG. 4

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ATTORNEY.

Patented Feb. l4, 1939 UNITED STATES PATENT OFFICE LOADING COIL CONTAINER Irvin W. Cox, Chicago, Ill., assignor to Associated Electric Laboratories, lnc., Chicago, 111., a corporation of Delaware Application March 7, 1936, Serial No. 67,739 Claims. (Cl. 1'7846) My invention relates in general to improvearound one end to plate I. The tube i3 is shown ments in loading coil containers and more spein detail in Fig. 4 and is a split tube of sheet iron cifically to a metallic case or container for en with a slot 15 extending throughout its length closing a plurality of loading coils or the like as shown. The four tubes are welded to plate 5 which are to be included in a transmission line. I in the positions shown in Fig. 3 with the slots In transmission systems it often becomes necl5 accessible from the outside and with a space essary to locate loading coils in places where through the center through which the cable may space is limited and where they must be protectpass. The cable 4 enters through a hole in the ed from surrounding conditions such as dampcenter of plate I and passes down the center ness or stray magnetic fields. It, therefore, bebetween the canisters so that the free or stub 10 comes necessary to have the coils enclosed in a end of the cable lies at the left end of this case which gives ample protection from such elecanisters as shown in Fig. 2. A soldering nipple ments and also one which takes up as little space 8 is threaded into the hole in plate I around as possible. the cable and a wiped joint is formed at 8 to I have, therefore, provided a container which hold the cable in place. 15 not only provides the necessary protection but After the canisters have been welded to plate also facilitates the assembling and wiring of the l, the coils may be assembled therein as shown. coils in the case. In the container of my design Around the inner wall of each canister is placed the coils are stacked in split tubes in such a a thin sheet of insulation such as 2| which is manner that each coil has a separate enclosure somewhat wider than the inner circumference of go m gne i ally shiel d and s p r f m h tube I3 and has its two ends projecting from the other coils and in which the cable wires may be slot 15 as shown in Fig. 10. In the bottom of readily secured to the coils through the slots. each canister is then placed a flat round disc of Further features of improvement will be pointinsulation such as shown in Fig. 2 at l6, which ed out in the following detailed description of fits snugly within th h t; of i l ti 2 25 the two sheets of drawings hereto attached in The first coil L is next placed in the canister which: with a wood pin or dowel I4 in the center there- 1 s a p View Of the Casi of. These coils L are of the well known doughnut Fig. 2 is a sectional view of the casing taken type having a circular metallic core and a windin the direction of the arrows along the line A-A ing th reon, he dowels M (Fig 3 are just 30 01' F 1 except that the cable and brackets on enough longer than the width of the coils to top of the casing are not show n se tio prevent any pressure being exerted on the coils Fig. 3 is a bottom view of the casing wit th themselves when stacked. After the first coil botto Plate removedis inserted, another disc l6 of insulation is placed Figs. 4-9, inclusive, are views of assembly details and Fig. 10 is an enlarged sectional view of on top thereof and then metal disc which 5 1 er or tubes showm 10mm may be of cold rolled steel and of the same size 32 i? i oifr i t ecl ih e r ein and the connectio ns there as dlsc Another 3150 I 15 then mseliwd that between each two coils are two discs of Although I have shown one embodiment of insulation and one of metal. This continues in 40 my invention in the accompanying drawings it like sequence until the containers are practically should be understood that various changes may filled. At the end of each canister farthest from be made in the specific construction shown withplate i are three threaded holes 15, two of which out departing from the spirit of my invention. re S n in Figs. 2 and 4. After the coils are For instance, while the embodiment shown is in the canister and the discs l6 and I! are placed capable of holding 52 coils, having four canover the last coil, then a final plate I8 is in- 45 isters or tubes of 13 coil capacity each, the sorted which has a threaded hole in the center same principles may be applied to a container (Fig. '7) carrying an adjusting screw l9 as shown of difierent sizes, having only one canister or in Fig. 2. Holding screws are now inserted in a greater number. the holes Hi to act as a back stop for plate I8.

Referring to the drawings and particularly to Screw I9 may now be tightened down to force Fig.2, the container has a top plate I of wrought the last metal plate I! away from plate l8 and iron or the like upon which the other elements thus compress the assembled coils and discs toare mounted. On the left side of plate I (Fig. 2) gether.

are mounted four metal tubes or canisters [3, Thus each coil is insulated from each other 55 I3, etc., which are spot welded at various points coil and the canister and is completely enclosed in a metallic shell comprising the canister walls and the metal discs I1. The coils are so placed in the canisters that the connecting leads therefrom are adjacent to the slot so that connections thereto can be readily made. After the canisters iii are all filled with the desired number of coils, then the large insulating disc is placed over the ends to act as a guide for the cable stub ends. The cable comes out through the hole 22 in the center and each of the four stub-ends which are the cable leads to the coils in one canister are turned down through one of the four like notches 23 in the edge of disc 20. This arrangement is clearly shown in Fig. 3. Each stub end of cable may now have its leads easily soldered to the leads from the coils along the slot I5 and after these connections are made the edges of the insulating sheet 2| are turned over around the connected cable stubs as indicated in Fig. 10.

After the coils are completely assembled and soldered to the cable a cover is placed over the canisters and secured to plate I. This cover comprises a section of water pipe I0 having a flange 9 welded thereto around one end and a plate 24 welded in the other end. A gasket 25 is placed adjacent plate I and then the flange 9 is bolted to plate I by means of a series of bolts 26 around the circumference as shown in Figs. 1, 2, and 3, to form a completely enclosed case. Brackets H and I2 are shown at two sides of the cover for use in mounting.

In order to securely hold the cable 4 in its place and prevent bending or damage thereto I have placed a pair of brackets 2 and 3 under two of the nuts on bolts 26. Each bracket has a clamping member at its outer end which brackets are clamped together over a lead sleeve I which covers cable 4 and prevents damage to its sheath. A pair of rings 5 and 6 are also provided in the cover plate I for use in handling the case or lowering it into manholes.

In addition I have provided a hole in plate i through which insulating compound may be poured, after assembly is completed, to completely seal the whole unit. This hole has a screw plug 21 for closing the hole after impregnation.

It will thus be seen that I have provided a loading coil container in Which the assembly of the coils in the canisters or tubes is very easily performed and yet provides for each coil a separate magnetically shielded case of its own to prevent interference between coils and cross talk between different circuits using adjacent coils. Also the split tubes in which the coils are assembled provides a very easy method of connecting the cable wires to the coil leads.

Having thus fully described the features and aspects of my invention what I consider to be novel is pointed out in the appended claims.

What is claimed is:

1. A loading coil case comprising a metallic tube, a series of coils mounted therein each insulated from the other, and each separately enclosed in a metallic box, a slot running lengthwise in said tube, lead wires for the coils extending through said slot, a cable stub for connection with'the coils lying adjacent said slot. the lead wires of the coils and the wires of the cable connected together along said slot outside said tube, and a casing for inclosing said tube and cable therein.

2. A loading coil container comprising a metallic head, a series of metal tubes rigidly secured at one end to the head, a cable passing through an opening in said head, a series of loading coils mounted in each tube, a slot extending longitudinally along each tube, each coil placed so that connections thereto may be made through one of the slots, part of the wires of the cable extending along each of said slots and connected to the coils therein, and a casing adapted to be fastened to said head for inclosing said tubes and cables therein.

3. In a loading coil container, a metal head, a series of tubes secured at one end to the head and extending outward therefrom, a slot running lengthwise in each tube, a cable passing through a hole in the head and extending parallel to the tubes and in the center thereof, a series of loading coils mounted in each tube, the leads of said cable being divided at the end of the tube farthest from the head and bent backward toward the head, certain of said leads connected to the coils in each of said tubes through the slots therein, and a casing adapted to be fastened to said head for inclosing said tubes and cables therein.

4. In a loading coil container, a metallic tube having a slot extending the length of the tube, a sheet of insulation around the inside of the tube and having its edges projecting through the slot, a series of loading coils in the tube, a cable extending along the outside of the tube with connections from the wires thereof to the coils through the slots, said sheet of insulation having its edges folded over around the cable to protect the connections.

5. In a loading coil container, a metallic case, a cable entering the case at one end and extending to the other end through the center of the case, a plurality of metallic tubes arranged in a circle around the cable, each tube having a plurality of loading coils therein and a slot thruout its length, said cable having its wires bent back along the outside of the tubes and connected to the coils through said slots.

IRVIN W. COX. 

